EP3433077B1 - Versiegelungswerkzeug und versiegelte verpackung - Google Patents

Versiegelungswerkzeug und versiegelte verpackung Download PDF

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Publication number
EP3433077B1
EP3433077B1 EP16759745.9A EP16759745A EP3433077B1 EP 3433077 B1 EP3433077 B1 EP 3433077B1 EP 16759745 A EP16759745 A EP 16759745A EP 3433077 B1 EP3433077 B1 EP 3433077B1
Authority
EP
European Patent Office
Prior art keywords
grooves
jaw
ridges
sealing
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16759745.9A
Other languages
English (en)
French (fr)
Other versions
EP3433077A1 (de
Inventor
Dani TULCHINSKI
Alexander STOLOV
Asaf Salant
Roy Beeri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HP Indigo BV
Original Assignee
HP Indigo BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HP Indigo BV filed Critical HP Indigo BV
Publication of EP3433077A1 publication Critical patent/EP3433077A1/de
Application granted granted Critical
Publication of EP3433077B1 publication Critical patent/EP3433077B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/006—Preventing damaging, e.g. of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/067—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web advancing continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2795/00—Printing on articles made from plastics or substances in a plastic state
    • B29C2795/002—Printing on articles made from plastics or substances in a plastic state before shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Definitions

  • a flexible package such as a package made from a thermoplastic film
  • a package or pouch is produced from the film by shaping the film and overlapping film layers, the package is filled and sealed by crimping using jaws.
  • the jaws can generate a seal applying heat and pressure to a seal region of the package.
  • the sealing area is printed, even if there is a protective varnish coating or lamination, the geometry of the jaws can cause defects in the printed image areas.
  • a sealing tool according to the preamble of claim 1 is known from US 5,076,040 .
  • a similar sealing tool is described in US 2012/0005993 A1 .
  • Different types of consumer goods such as food products, pharmaceuticals, cosmetics, toys, just to name a few examples, are packaged using thin films or sheets of flexible packaging material, with images such as corporate branding, or product information printed onto the film.
  • the flexible packaging material serves to protect the product from, for example, moisture, oxidation or pathogens, while also providing information to the user regarding the nature and origin of the product contained therein.
  • Liquid electrophotographic printing is one method by which images or information can be printed onto substrates such as paper or plastic.
  • the LEP printing process involves creating an image on a photoconductive surface, applying an ink having charged particles to the photoconductive surface, such that they selectively bind to the image, and then transferring the charged particles in the form of the image to a print substrate.
  • electrostatic printing or “electrophotographic printing” generally refers to a process that provides an image that is transferred from a photo imaging substrate either directly or indirectly via an intermediate transfer member to a print substrate. As such, the image is not substantially absorbed into the photo imaging substrate on which it is applied.
  • electrostatic printers or “electrostatic printers” generally refer to those printers capable of performing electrophotographic printing or electrostatic printing, as described above.
  • Liquid electrophotographic printing is a specific type of electrophotographic printing where a liquid composition is employed in the electrophotographic process rather than a powder toner.
  • the flexible substrate to which the liquid electrophotographic ink composition is to be printed (and thus is also referred to herein as the print substrate) may be any material suitable for use in a liquid electrophotographic printing process and suitable for use in a flexible packaging material.
  • the flexible substrate may form the outermost layer of a laminated flexible packaging material or it may form the entire packaging material.
  • the flexible substrate may be transparent, semitransparent or opaque.
  • the flexible substrate comprises a film of a polymer, for example a thermoplastic polymer.
  • the flexible packaging material is formed from a PET/PE pre-laminate or from a PET/AI/PE pre-laminate.
  • the flexible substrate comprises a film of biaxially oriented polypropylene (BOPP), polypropylene (PP), or polyethylene terephthalate (PET).
  • BOPP biaxially oriented polypropylene
  • PP polypropylene
  • PET polyethylene terephthalate
  • the flexible substrate may comprise a single-layer or multiple-layer film having a thickness in the range of about 5 ⁇ m to about 150 ⁇ m, or from about 10 ⁇ m to about 20 ⁇ m, or of about 12 ⁇ m, for example.
  • the liquid electrophotographic printing (LEP) composition useful for printing on the flexible packaging materials may comprise a colorant or pigment, a polymer resin and a carrier fluid or liquid.
  • the LEP composition may further comprise additives such as charge directors, charge adjuvants, surfactants, viscosity modifiers, emulsifiers and the like.
  • the LEP composition may not contain any pigment, or comprise substantially zero pigment and thus be a pigment-free composition, useful in providing a particular transparent gloss or sheen to a printed substrate.
  • the printed packaging material may comprise a primer layer to promote adhesion between the LEP composition and the packaging material, and an overprint varnish covering and protecting the LEP composition.
  • Overprint varnish (OPV) may be applied on surface printed image to protect the LEP printing against chemical and mechanical damage, heat, UV radiation and the like. Another way to protect printed image can be done by lamination, using adhesive and secondary substrate.
  • Fig. 1 shows an example of a system for producing a package from a flexible packaging material.
  • the system comprises a roll of packaging material 10 which, in this example, may be a thermoplastic film substrate having a surface printed by LEP with an overprint varnish (OPV) coating.
  • the packaging material 10 can be transported as a film web 12, via a number of rollers 14, to a forming station 16.
  • forming station 16 comprises a forming tube 18 and a forming shoulder 20 but other types of forming devices can be used.
  • the forming station reshapes the film web 12 to have a tubular shape which is closed along a longitudinal seam 22, produced downstream of the forming station, at seam forming unit 26.
  • This "endless" tube of the thermoplastic film is fed to a sealing station 24 where a bottom seam can be generated by sealing jaws 30, 32. This will become the bottom of a new package or pouch. Then a product (not shown) is dispensed into the package and the top of the package can be sealed by a top seal using the same pair of sealing jaws 30, 32 or another pair of sealing jaws. The package is sealed in the region of the seams by application of heat and pressure via the sealing jaws 30, 32.
  • the sealing medium is provided by the material of the thermoplastic film which is at least partially melted during the sealing process. In one example, a pre-laminated structure is used, such as PET/A1/PE, and the PE film is melted as the sealing medium. As soon as the sealing medium has cooled off and cured, the seal is completed. The sealing process may take less than a second.
  • the sealing station 24 may comprise two pairs of sealing jaws, a lower pair for forming the top seal of a package that has just been filled; and an upper pair, closer to the forming station 16, for forming the bottom seam of the next package.
  • a cutting device e.g. a blade, may be provided between the two pairs of sealing jaws to cut and separate subsequent packages.
  • a vertical system design is shown in fig. 1 , this is just an example and different system configurations can be contemplated.
  • forming of the package, filling and sealing the package can be performed in an in-line process at a single location or station or it can be distributed across different locations or stations.
  • fig. 1 shows an in-line system performing all of the steps of forming, filling and sealing
  • other systems can provide a pre-form of the package which is shipped to a customer where the package is filled with a product and sealed.
  • Fig. 2 shows a number of different package designs according to various examples.
  • One package 40 has a pillow design, including a top seal 42 and a bottom seal 44 which may be formed by a pair of sealing jaws as described with regard to fig. 1 , for example.
  • Another package 50 has a so-called block bottom design including a top seam 52 which may be formed by a pair of sealing jaws. The package has a flat bottom and can stand up.
  • Another package 60 has a so-called gusseted design, including a top seal 62 and a bottom seal 64, which is a variation of the pillow design.
  • Packages 50 and 60 have side folds to provide for additional volume.
  • Each of the seals can be formed by a pair of sealing jaws including grooves and ridges which extend along the length of the seam to generate a "wavy" sealing structure.
  • Package 70 comprises top seal regions 72 and side seal regions 74.
  • Each of the seal regions 72, 74 in the example of fig. 3 , comprises three ridges and three grooves which are shaped according to a sinusoidal of or approximately sinusoidal wave. The grooves each have rounded bottom portions and the ridges have rounded top portions.
  • the shape of the wavy seal regions in explained in further detail with respect to fig. 4 , showing an example of a sealing jaw for producing the seal region.
  • Fig. 4 shows an example of a sealing jaw 30 which is part of the sealing tool for producing a sealed seam of the package.
  • the sealing jaw 30 comprises an elongate tool plate 34 having a length extending in the direction of the seal to be formed. Support studs 36 are provided at shorter side faces of the plate for mounting the jaw in a sealing tool.
  • the tool plate 34 features a flat surface portion 38 and a wavy profile, including alternating grooves 40 and ridges 42. In the example of fig. 4 , four grooves and four ridges are provided on the tool plate 34surface.
  • the wavy profile of the tool plate 34 comprises from one to six grooves and from one to six ridges, or from two to four grooves and from two to four ridges.
  • the tool plate 34 can be made from stainless steel iron or another matter which provides a substrate for forming the wavy profile. Teflon coating on the jaws can be applied to avoid stickiness to the sealing surface.
  • the grooves have a curved cross-section in a bottom region thereof, and the ridges have a curved cross-section in a top region thereof.
  • the curved cross-section of the grooves and the curved cross-section of the ridges may have the same or approximately the same radius of curvature.
  • the curved cross-section of the grooves and the curved cross-section of the ridges may have a radius of curvature of about 0.5 to 2 mm.
  • the sealing jaw 30 shown in fig. 3 may be used in combination with a further mating sealing jaw (not shown) wherein the pair of sealing jaws are part of a sealing tool.
  • Each sealing jaw 30 comprises a surface having a wavy profile, wherein the sealing jaws of one pair have complementary profiles, including grooves and ridges which, when the two jaws are brought together, engage with each other.
  • a depth of the grooves of one sealing jaw may correspond to a height of the ridges of the mating sealing jaw; and a pitch of the grooves of one sealing jaw may correspond to a pitch of the ridges of a mating with heating jaw.
  • the pitch may be in the range of about 1 to 3 mm.
  • a depth of the grooves of one sealing jaw may correspond to a height of the ridges of a mating sealing jaw wherein the depth and the height are in the range of about 0.3 to 0.8 mm.
  • the ratio between the depth of the grooves and a pitch of the grooves may be in the range of about 1:10 to 1:3.
  • the radius of curvature of the grooves at the bottom portion of the grooves and the radius of curvature of the ridges at the top of the ridges may be about 1.5 to 2.5 of the depth of the grooves or about 1/10 to 3/4 of the pitch of the grooves.
  • the grooves and the ridges may form a sinusoidal or approximately sinusoidal profile on the respective jaw surfaces.
  • the sealing jaw 30 shown in fig. 4 is used in combination with a corresponding meeting sealing jaw having a wavy profile which complements the profile of the sealing jaw 30 wherein the pair of sealing jaws is part of a sealing station or sealing tool.
  • the sealing tool further comprises a heating device coupled with one or both of the sealing jaws.
  • the heating device may be integrated at least partially into one or both of the sealing jaws.
  • the sealing tool, which in fig. 1 is schematically shown at 24, further comprises a mechanism for moving the sealing jaws towards each other and apart. For forming the seal, the sealing jaws, either one or both, are heated and moved towards each other, with part of the packaging material placed in the nip between the pair of sealing jaws.
  • the sealing jaws when closing the sealing jaws over the packaging material, apply pressure and heat to the packaging material so as to at least partially melt the material and seal the packaging material in a seal region. As a result, a wavy sealed seam region is generated, an example of which is shown in fig. 3 .
  • the wavy profile of the sealing jaws avoids grooves and ridges having sharp edges and hence avoids damaging the printed packaging material during sealing.
  • packaging material which is printed by LEP technology, even if an over print varnish is provided, is vulnerable to heat sealing using grooved jaws having sharp edges because the LEP chemistry is sensitive to high temperatures and the grooved jaws' sharp geometry, along with the pressure applied. Mechanical movement of ink and over print varnish can be generated which may be visible on the final package.
  • the wavy profile of the sealing jaws may be used, an example of which is shown in fig. 4 .
  • a packaging material including a PET/PE pre-laminate was surface printed using LEP technology and an over print varnish.
  • a package was produced by overlapping two layers of the packaging material and sealing the packaging material in a sealing area, using sealing jaws such as those shown in fig. 4 .
  • a similar seal region has been produced using sealing jaws having sharp edges at the bottom of the grooves and the top of the ridges.
  • the surface printed packaging material was sealed at an elevated temperature of about 180°C, applying a pressure of about 450,000 Pa, for a time of about 1 sec, in both the example and the comparative example.
  • different temperature ranges and different pressure ranges can be selected, including temperatures in the range of 150 to 200°C and pressures in the range of 200,000 to 600,000 Pa (2-6 bar).
  • a package according to the example and a package according to the comparative example underwent a number of tests to compare the performance, e.g. having regard to sealing bond strength at elevated temperatures, drop test, leak test, and pasteurization.
  • a drop test the package was filled with 200 ml water, sealed and dropped from a height of 1.8 m. The package then was visually inspected for leaks in the sealing area wherein no defects could be observed.
  • packages filled with water underwent a pasteurization process at 95°C for one hour. Again, no degradation of the sealed seam region could be observed after the pasteurization process.
  • the tests revealed that the bond strength of the example was at least as good as or even better than the bond strength of the comparative example.
  • the sealing jaws having the wavy profile e.g. as shown in fig. 4
  • the printing on the packaging material was not damaged in the sealing area; whereas, in the comparative example, image defects could be observed where the sharp edges of the sealing jaws displaced the ink distorting the printed image or even scraped or scratched off part of the printing.
  • Using wavy jaws avoids mechanical ink movement and yields higher-quality output after sealing is made.
  • Fig. 5 shows a schematic diagram for illustrating an example of a wavy profile of the sealing jaws.
  • the profile has a sinusoidal or approximately sinusoidal cross-section.
  • line S represents the flat surface portion 38 of the tool plate 34 of the sealing jaw
  • the wavy profile illustrated in fig. 5 comprises grooves 50 and ridges 52.
  • an amplitude A correspondence to a depth of a groove a pitch P illustrates a distance between two neighboring ridge tops
  • a radius R represents a parameter of the curvature at the ridge top.
  • the depth of a groove has the same amplitude as the height of a ridge; the pitch of neighboring ridges is the same as the pitch of neighboring grooves; and the radius of curvature at the ridge top is the same as the radius of curvature at the groove bottom.
  • Some examples of the parameters amplitude A, pitch P, and radius R are: 0.3 mm ⁇ A ⁇ 0.8 mm; 1 mm ⁇ P ⁇ 3 mm; and 0.5 mm ⁇ R ⁇ 2 mm.
  • the absolute values, among others, will depend on the size and nature of the package to be sealed. Also the number of grooves and ridges will depend on the size and nature of the package and on the intended bonding strength.
  • Fig. 6 shows a flow diagram of one example of a process of producing a package from a flexible packaging material.
  • the process starts in block 62 by providing two layers of the flexible packaging material.
  • the two layers are overlapped to form a seal region.
  • the seal region of the two layers is inserted between two sealing jaws, including a first jaw having a first jaw surface and a second jaw having a second jaw surface wherein the respective jaw surfaces arranged opposite to each other.
  • the first jaw surface includes a plurality of grooves and the second jaw surface includes a plurality of ridges, the grooves and ridges extending along the length of the seal region.
  • the respective grooves and ridges can be provided in a wavy surface profile, such as the one shown in fig. 4 .
  • the two sealing jaws are moved towards each other to close the jaws, so as to engage the grooves and ridges of the respective opposite jaw surfaces, with the packaging material they between, and to apply heat and pressure to the seal region of the packaging material to create a wavy seal structure in the seal region.
  • the wavy seal structure includes grooves and ridges corresponding to the grooves and ridges of the jaw surfaces, wherein the grooves and ridges in their bottom and top regions have curved cross-sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Package Closures (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (15)

  1. Siegelwerkzeug zum Versiegeln eines flexiblen Verpackungsmaterials (10), wobei das Siegelwerkzeug Folgendes umfasst:
    eine erste Backe (30) mit einer ersten Backenfläche (38) und eine zweite Backe (32) mit einer zweiten Backenfläche, wobei die jeweiligen Backenflächen einander gegenüberliegend angeordnet sind,
    wobei die erste Backenfläche (38) eine Nut (40; 50) enthält und die zweite Backenfläche einen Grat (42, 52) enthält und wobei die Nut an der ersten Backenfläche und der Grat an der zweiten Backenfläche so ausgelegt sind, dass sie ineinanderpassen, wenn die Backenflächen aufeinander zu bewegt werden, und
    wobei die Nut (40; 50) an der ersten Backenfläche einen Nutboden mit einem gekrümmten Querschnitt aufweist und der Grat (42, 52) eine Gratdecke mit einem gekrümmten Querschnitt aufweist;
    dadurch gekennzeichnet, dass der gekrümmte Querschnitt der Nut und der gekrümmte Querschnitt des Grats einen Krümmungsradius von mindestens 0,5 mm aufweisen.
  2. Siegelwerkzeug nach Anspruch 1, wobei der gekrümmte Querschnitt der Nut (40; 50) und der gekrümmte Querschnitt des Grats (42, 52) den gleichen oder etwa den gleichen Krümmungsradius aufweisen.
  3. Siegelwerkzeug nach Anspruch 2, wobei der gekrümmte Querschnitt der Nut (40; 50) und der gekrümmte Querschnitt des Grates (42, 52) einen Krümmungsradius von mindestens 0,5 mm bis etwa 2 mm aufweisen.
  4. Siegelwerkzeug nach Anspruch 2, wobei die erste Backenfläche eine Vielzahl von Nuten (40; 50) und die zweite Backenfläche eine entsprechende Vielzahl von Graten (42, 52) enthält,
    wobei eine Tiefe der Nuten (40; 50) einer Höhe der Grate (42, 52) entspricht; und
    wobei ein Abstand der Nuten (40; 50) einem Abstand der Grate (42, 52) entspricht.
  5. Siegelwerkzeug nach Anspruch 4, wobei das Verhältnis zwischen der Tiefe der Nuten (40; 50) und einem Abstand der Nuten im Bereich von etwa 1:10 bis 1:3 liegt.
  6. Siegelwerkzeug nach Anspruch 4, wobei der Krümmungsradius der Nuten (40; 50) und der Krümmungsradius der Grate (42, 52) etwa 1,5 bis 2,5 der Tiefe der Nuten oder etwa 1/10 bis 3/4 des Abstands der Nuten beträgt.
  7. Siegelwerkzeug nach Anspruch 1, wobei die erste Backenfläche eine Vielzahl von Nuten (40; 50) enthält und die zweite Backenfläche eine entsprechende Vielzahl von Graten (42, 52) enthält; und
    wobei ein Abstand der Nuten (40; 50) einem Abstand der Grate (42, 52) entspricht, wobei der Abstand im Bereich von etwa 1 bis 3 mm liegt.
  8. Siegelwerkzeug nach Anspruch 4, wobei eine Tiefe der Nuten (40; 50) einer Höhe der Grate (42, 52) entspricht, wobei die Tiefe und die Höhe im Bereich von etwa 0,3 bis 0,8 mm liegen.
  9. Siegelwerkzeug nach Anspruch 1, wobei die erste Backenfläche eine Vielzahl von Nuten (40; 50) und die zweite Backenfläche eine entsprechende Vielzahl von Graten (42, 52) enthält, wobei die Nuten (40; 50) und die Grate (42, 52) ein sinusförmiges oder annähernd sinusförmiges Profil auf den jeweiligen Backenflächen bilden.
  10. Siegelwerkzeug nach Anspruch 4, wobei die erste Backenfläche 2 bis 8 Nuten (40; 50) und die zweite Backenfläche 2 bis 8 Grate (42, 52) enthält.
  11. Siegelwerkzeug nach Anspruch 1, das ferner eine Heizvorrichtung enthält, die mit einer oder beiden der ersten Backe (30) und der zweiten Backe (32) gekoppelt ist.
  12. Verpackung, die einen flexibles Verpackungsmaterial (10) enthält, das elektrofotografisch gedruckte Bilder oder Informationen darauf aufweist,
    wobei zwei Schichten des flexiblen Verpackungsmaterials (10) verbunden sind, um eine Siegelnaht entlang einer Kante der Verpackung zu bilden, wobei die Naht durch eine wellenförmige Siegelstruktur mit einer Nut (40; 50) und einem benachbarten Grat (42, 52) versiegelt ist, wobei die Nut einen Nutboden mit gekrümmtem Querschnitt und der Grat eine Gratdecke mit gekrümmtem Querschnitt aufweist,
    wobei der gekrümmte Querschnitt der Nut (40; 50) und der gekrümmte Querschnitt des Grats (42; 52) einen Krümmungsradius von mindestens 0,5 mm aufweisen.
  13. Verpackung nach Anspruch 12, wobei das flexible Verpackungsmaterial (10) ein PETbasiertes Laminat umfasst, das eine flüssige elektrofotografische Zusammensetzung und einen darauf aufgedruckten Überdrucklack aufweist.
  14. Verfahren zum Herstellen einer Verpackung aus einem flexiblen Verpackungsmaterial (10), wobei das Verfahren Folgendes umfasst:
    Bereitstellen von zwei Schichten des flexiblen Verpackungsmaterials (10) und Überlappen der zwei Schichten, um einen Siegelbereich (52; 62; 70, 72) zu bilden;
    Einsetzen des Siegelbereichs der beiden Schichten zwischen zwei Siegelbacken (30, 32), die eine erste Backe mit einer ersten Backenfläche und eine zweite Backe mit einer zweiten Backenfläche enthalten, wobei die jeweiligen Backenflächen einander gegenüberliegend angeordnet sind, wobei die erste Backenfläche eine Vielzahl von Nuten (40; 50) enthält und die zweite Backenfläche eine Vielzahl von Graten (42, 52) enthält, wobei sich die Nuten und Grate (42, 52) entlang der Länge des Siegelbereichs erstrecken; Bewegen der beiden Siegelbacken (30, 32) aufeinander zu und Verwenden der Siegelbacken (30, 32), um Wärme und Druck auf den Siegelbereich auszuüben, um eine wellenförmige Siegelstruktur im Siegelbereich zu erzeugen, einschließlich Nuten und Graten entsprechend den Nuten (40; 50) und Graten (42, 52) der Backenflächen, wobei die Nuten und Grate mit jeweiligen Boden- und Deckenbereichen ausgebildet sind, wobei die Boden- und Deckenbereiche einen gekrümmten Querschnitt mit einem Krümmungsradius aufweisen, der dadurch gekennzeichnet ist, dass der Krümmungsradius mindestens 0,5 mm beträgt.
  15. Verfahren nach Anspruch 14, wobei der Krümmungsradius mindestens 0,5 mm bis etwa 2 mm beträgt.
EP16759745.9A 2016-08-31 2016-08-31 Versiegelungswerkzeug und versiegelte verpackung Active EP3433077B1 (de)

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Application Number Priority Date Filing Date Title
PCT/EP2016/070444 WO2018041344A1 (en) 2016-08-31 2016-08-31 Sealing tool and sealed package

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EP3433077B1 true EP3433077B1 (de) 2020-02-26

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Publication number Publication date
EP3433077A1 (de) 2019-01-30
CN109476092A (zh) 2019-03-15
US20190177021A1 (en) 2019-06-13
WO2018041344A1 (en) 2018-03-08

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